Machine for sharpening plowshares.



L. B. HESLET.

MACHINE FOR SHARPBNING PLOWSHARBS. APPLIOATION FILED 51116, 1910.

983,714, Patented Feb. 7, 1911.

5 8HEETS-BHEET 1.

wwmm i v n-n: NORRIS PE'IIERS \,b-. WASHINGTON, 11cv 'L; HESLET. MACHINEFOR SHARPENING PLOWS HARES. APPLIOATIIOH FILED SEPT. 16, 1910.

983,714. Patented Feb. 7,1911.

5 SHEETS-SHEET 2.

am ne/Mow L e w/zl s 63 [6} m %%z%@ my m 1m: mamas PETERS ca., musmnawmD. c.

L. B. HESLET;

MACHINE FOR SHABPENING PLOWSHARES.

APPLICATION FILED SEPT. 16, 1910. I 983,714. Patented Feb. 7, 1911.

' 5 SHEETS-SHEET 3.

rm: NORRIS mwsns ca, wnsnmcmu n c L. B. HESLET. MACHINE FOR SHABPENINGPLOWSHARES.

APPLICATION FILED SEPT.16, 1910.

Patented Feb. 7, 1911.

6 SHEETS-SHEET 4.

L. HBSLET. MACHINE FOR SHARPENING PLOWSHABES.

APPLICATION FILED SEPT. 16, 1910.

Patented Feb. 7, 1911.

5 SHEETS-SHEET 6.

aQm EJ7 3249? rim min: was mi. W. m c.

LEWIS B. HESLET,

or DECKER,

INDIANA.

MACHINE FOR SHARPENING PLOWSI-IARES.

Application filed September 16, 1910.

To all whom it may concern:

Be it known that I, Lnwis B. I-IEsLn'r, a citizen of the United Statesof America, residing at Decker, in the county of Knox and State ofIndiana, have invented new and useful Improvements in Machines forSharpening Plowshares, of which the following is a specification.

This invention relates to machines for sharpening plow shares, and ithas for its object to produce a machine of this class of simple andeflicient construction in which the plow share, after being adjusted inposition for operation, may be automatically ground or sharpened withoutfurther attention on the part of the operator.

A further object of the invention is to produce a machine of thecharacter described including a continuously driven sharpening wheel anda spring supported or floating frame having a table supported forreciprocation upon which the object to be sharpened may be mounted inproper position to be presented to the sharpening or grinding wheel.

Further objects of the invention are to simplify and improve the generalconstruction and operation of a device of the character described.

With these and other ends in view which will readily appear as thenature of the invention is better understood, the same consists in theimproved construction and novel arrangement and combination of partswhich will be hereinafter fully described and particularly pointed outin the claims.

In the accompanying drawings has been illustrated a simple and preferredform of the invention, it being, however, understood that no limitationis necessarily made to the precise structural details therein exhibited,but that changes, alterations and modifications within the scope of theclaims may be resorted to when desired.

In the drawings,Figure l is a side elevation of a plow sharpeningmachine constructed in accordance with the invention. Fig. 2 is a topplan view of the same. Fig. 3 is a vertical sectional view taken on theplane indicated by the line 33 in Fig. 2. Fig. 4 is a front elevation.Fig. 5 is a horizontal sectional view taken on the plane indicated bythe line 5*5 in Fig. 4.

Corresponding parts in the several figures are denoted by likecharacters of reference.

The frame A of the improved machine Specification of Letters Patent.

Patented Feb. "Z, 1911.

Serial No. 582,363.

may be constructed in any suitable manner of material preferablyincluding structural or angle iron, whereby lightness and strength maybe combined. The frame supports a platform 1 equipped with bearings 2, 2for a shaft 3 and a counter shaft 4. Bearings are provided upon theframe of the machine for the main shaft 5 having fast and loose pulleys6, 7, said shaft being adapted to be driven by abelt 8 from any suitablesource of power. A pulley 9 upon the main shaft transmits motion througha belt 10 to the shaft 3 bya band wheel 11 upon said shaft. The shaft 3and counter shaft 4 are provided with intermeshing pinions 12, 12 whichare loosely mounted upon said shafts and with sprocket wheels 13, 13which are likewise loose upon the shafts, said sprocket wheels beingconnected by a chain 14. The hubs of the pinion 12 and the sprocketwheel 13 upon the counter shaft 4 are pro vided with clutch members 15,16, either one of which may be engaged by a clutch 17 which is slidableupon the counter shaft with which it is connected for rotation by meansof a key or spline 18. The clutch 17 has an annular groove 19 whichreceives one arm 20 of a bell crank B, the other arm of which 21 extendssubstantially at right angles to the arm 20. It will be readily seenthat by throwing the bell crank lever the clutch 17 may be shiftedbetween the clutch members 15 and 16 of the pinion 12 and the sprocketwheel 13, respectively, thereby reversing the direction of rotation. ofthe counter shaft 4. The top of the frame A is provided with boxes 22affording bearings for a shaft 23 carrying the emery wheel 24 which issupported in the usual manner by a mandrel 25. The shaft 23 has a pulley26 which is connected by a belt 27 with a band wheel 28 upon the maindriven shaft 5 from which motion will thus be transmitted to the shaft23.

Suitable bearings are provided for an upright or vertically disposedshaft 29 carrying at one end a worm gear 30 meshing with a worm 31 uponthe counter shaft 4. The upright shaft 29 carries adjacent to its upperend a drum 32.

Pivotally connected with lugs 33 upon the platform 1 are arms or levers34 connected adjacent to their free ends by a cross bar 35. The arms orlevers are provided with hooks 36 which are connected with the top ofthe frame structure by means of springs 37,

tending to lift the said arms or levers. The frame structure includesflanges 38 forming guides for grooved wheels or rollers 39 connectedwith a plate 40 which is thus capable of moving up and down upon theframe structure, The plate 40 is equipped with bracket members 41supporting a frame or table C which is composed of approximatelyparallel side members 42 which are con nected and spaced apart by endmembers 43, which latter are provided upon their inner faces withsuitably supported guide members, such as pulleys 44. The frame supporting brackets 41 are connected with the rod 35 connecting the arms orlevers 34 by means of braces 45. It will thus be seen that the frame ortable C may be regarded as being supported by means of the. springs 37,said table being guided securely in its vertical movement by means of.the grooved wheels 39 upon the plate 40, saidgrooved wheels or pulleysengaging the guide flange 38 which constitutes a part of the framestructure.

The side members or bars 42 ofthe frame C are rounded or of circularcross section to constitute tracks for a slide or carriage D which inits construction includeswcross bars 46, one of which is suitablyconnected with an endless flexible element 47 which is guided over thepulleys or guide members 44 and wound one or more times about the drum32. It is obvious that when the drum is rotated, the carriage will bemoved along mitted from the main shaft 5 to the shaft.

3, the latter will transmit rotary motion to the counter shaft 4 eitherthrough the pinions 12, 12 or the sprocketwheels 13, 13, according tothe position of the clutch 17. The worm 31 upon the counter shaft 4meshes with and rotates the worm gear 30 upon the shaft 29 carrying thedrum 32, whereby motion will be imparted to the slide or carriage Dwhich will thus move in one direction until one of thestop members 52engages the arm 21 of the bell crank B which is extended in the path ofsaid stops, thus shifting the position of the bell crank lever and ofthe: clutch, thereby reversing the direction of rotation of the countershaft 4 and consequently the direction of ment, when the arm 21 of thebell crank will again be engaged by a stop member 52, thereby throwingthe clutch and reversing the direction of movement.

The carriage D includes a shaft 53 suitably supported in bearings 54upon said carriage, said shaft having an operating lever or arm 55adapted to engage a curved ratchet bar 56, whereby it may be retained inadjusted position. The shaft 53 is provided with terminal cranks 57supporting one edge of a supporting plate 58, the free edge of which isslidably supported upon lugs 59 extending upwardly from the carriage.The supporting plate 58 is equipped with a clamping device (30 includinga set screw 61 whereby a plow share 62 that is to be operated upon maybe safely supported in suitable position for operation. It will bereadily seen that the supporting plate and the clamping device aredisposed in proximity to the emery wheel 24 and that, by adjusting thesupporting plate 58 by means of the crank shaft 53, the edge of the plowshare to be operated upon may be, presented at different angles so thatit may be ground with the desired bevel. The frame or table C whichsupports the slide Or carriage is in turn supported by the springs 37which obviously serve to hold the work to. the emery wheel with a considerable degree of tension. Suitable means of any well'knowndescription may be provided for modifying the degree of tension withwhich the object to be operated upon is held against the emery stone. Astop member 63 consisting of a suitably supported setscrew is disposedin the path of the plate 40, thus limiting the movement of the springsupported or floating work carrying device in the direction of the emerywheel, thereby positively preventing unnecessary and wasteful grinding,assuming the stop member to have been properly adjusted before thebeginning of the operation.

' From the foregoing description, taken in connection with the drawingshereto an nexed, the operation and advantages of this invention will bereadily understood by those skilled in the art to which it apper tains.

It will be seen that a simple machine has been provided whicheis notliable to get out of order under ordinary circumstances and which may bedriven from power derived from any suitable source. After placing thework in position upon the machine, adjusting the stop member 63, thestops 52 and the crank shaft 53 and starting the machine, the same maybe permitted to run without further attention on the part of the operator until the work has been finished. Should the operator not be on handto stop the machine at the proper moment no harm will be done becausethe stop member 63 I will prevent the plow share or other object frombeing further operated upon by the emery wheel after the said stop 63 isen countered by the plate 40.

The machine may be manufactured and placed upon the market at a moderateexpense which will be within the means of blacksmiths and others runningsmall repair shops and enabling such workers to undertake work whichcannot be conveniently handled or well performed manually.

Having thus described the invention, what is claimed as new, is:-

1. In a machine of the character described, an upright shaft carrying adrum, means for driving said shaft and for reversing the direction ofrotation, a vertically movable spring supported table, a carriageslidable upon said table, and a flexible element connecting the carriagewith the drumupon the upright shaft.

2. In a machine of the character described, a frame having a platform,an upright approximately vertical shaft supported for rotation andhaving a drum adjacent to its upper. end, means for driving said shaftand for reversing the direction of rotation, a. resiliently supportedtable, a carriage slidable upon the latter, a suitably guided endlessflexible element wound upon the drum and connected with the carriage,and a grinding element supported for rotation above and adjacent to thecarriage. a

3. In a machine of the character described, a resiliently supportedtable, a carriage supported for reciprocation upon the table, stopmembers adjustably connected with the carriage, a shaft having a drum, asuitably guided flexible element wound upon the drum and connected withthe carriage, means for driving the shaft, and means for reversing thedirect-ion of rotation including a bell crank having one arm extended inthe path of the stops connected with the carriage.

4. In a machine of the character described, a'resiliently supportedtable, a carriage supported for reciprocation upon the table, a shafthaving a drum, a suitably guided flexible element wound upon the drumand connected with the carriage, an apron depending from the carriageand having a longitudinal slot with notches in the lower edge thereof,stop members adjustable in said notches, means for driving the drumcarrying shaft, and means for reversing the direction of rotationincluding a bell crank having an arm extended in the path of the stopmembers.

5. In a machine of the character de scribed, a frame including guideflanges, a vertically movable plate having grooved wheels engaging theguide flanges, pivotally supported arms, a cross bar connecting thesame, bracket members upon the vertically movable plate, bracesconnecting the brackets with the cross bar connecting the pivoted arms,springs connecting the arms with the frame to resiliently support saidarms and related parts, a table supported upon the bracket members, acarriage mounted for reciprocation upon the table, means for impartingreciprocatory motion to the carriage, work-holding means upon thecarriage, and a grinding element supported for rotation in proximity tothe carriage.

6. In a machine of the character described, a resiliently supportedtable, a carriage supported for reciprocation thereon, a crank shaftsupported for oscillation upon the carriage and having an operating arm,means for retaining the arm at various adjustments, suitably supportedmembers connected pivotally with the cranks of the oscillatory shaft,work holding means upon said members, a grinding element supported forrotation in proximity to the carriage, and means for impartingreciprocatory movement to the carriage.

In testimony whereof I afiix my signature in presence of two witnesses.

LEVIS B. HE SLET.

WVitnesses FRANK G. HEsLE'r, AsHLEY M. LYTLE.

